Canon LBP7210Cdn Manual page 371

Be sure to shake the toner cartridge gently.
If you do not shake the cartridge gently, toner may spill out.
Place the toner cartridge on a flat surface.
Pull out the sealing tape.
(1) While holding the toner cartridge, hook your finger into the tab to remove it.
(2) Pull out the sealing tape (approx. 50 cm long) straight in the direction of the arrow
gently.
CAUTION
Be careful not to allow the toner to scatter.
Do not pull out the sealing tape forcefully or stop at midpoint, as this may cause toner to spill out.
If toner gets into your eyes or mouth, wash them immediately with cold water and consult a
physician.
IMPORTANT
Pull the sealing tape completely out of the toner cartridge.
Do not pull the sealing tape diagonally, upwards, or downwards. If the tape is
severed, this may become difficult to pull out completely.
If the sealing tape stops at midpoint, pull it out of the toner cartridge completely.